iPadOS 9.9.11.0.2 (build 15A6421) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2017-10-03T16:59:05Z. The update package is 1.7 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b286b2873ceccf572f4b36080b67a61dccdf41a6.zip.